Spraying Systems Spain, S.L. (Autojet) - Other equipment for the plastics industry
Systems of pulverización of antiadherente: for the manufacture of containers of PET
In the processes of manufacture of containers of PET, so much in preformas of bottles of PET, as in films for the manufacture of trays, is necessary to apply a solution of silicone like antiadherente. This process is critical since his correct application is vital to guarantee the correct operation of the back process of manipulation and termoformado. Spraying Systems Has developed two systems successfully for this application.
The first of them, for the manufacture of preformas of bottles, powders the antiadherente by means of guns of atomisation with air, on the preformas, once that they are deposited in the container. The gun is accionada by means of pneumatics actuator with system of car - cleaning of the orifice to avoid obstructions. Besides in the extreme of the filter installs a sensor SprayCheck that detects if there is a failure in the pulverización or if there is dripping. The team is a portable system that includes the picture of control AutoJet, to monitor and control all the parameters of the pulverización, a picture of regulation with automatic valves and a tank of pressesure for the storage and presurización of the antiadherente.
The second system applies the antiadherente on the film of PET before the termoformado of the trays, using a rampa of guns of pulverización PulsaJet of accionamiento electrical to 24 Vcc. The fundamental principle of these guns is that they allow to apply the liquid to powder in ratios of 1 to 100 and upper keeping the conditions of pulverización, that is to say pressesure, degree of pulverización, angle, etc. This achieves by means of the control PWM (Presses With Modulation), in which it varies the ratio opening-closing of the gun to high frequency. For example, to apply 25% of discharge activates the gun of form cíclica 10 mili second ON and 30 mili second OFF. In lines with variation of speed, or with frequent stops, avoids the excessive or insufficient application since the ratio of application of product keeps independent constant of the speed of advance. With this reduce the rejections and the excessive consumption of product. The team is formed by the rampa of pulverización, the picture of control and regulation AutoJet, a bomb of diafragma and an eyector for agitation of the antiadherente in the interior of the tank and avoid the sedimentación.
The first of them, for the manufacture of preformas of bottles, powders the antiadherente by means of guns of atomisation with air, on the preformas, once that they are deposited in the container. The gun is accionada by means of pneumatics actuator with system of car - cleaning of the orifice to avoid obstructions. Besides in the extreme of the filter installs a sensor SprayCheck that detects if there is a failure in the pulverización or if there is dripping. The team is a portable system that includes the picture of control AutoJet, to monitor and control all the parameters of the pulverización, a picture of regulation with automatic valves and a tank of pressesure for the storage and presurización of the antiadherente.
The second system applies the antiadherente on the film of PET before the termoformado of the trays, using a rampa of guns of pulverización PulsaJet of accionamiento electrical to 24 Vcc. The fundamental principle of these guns is that they allow to apply the liquid to powder in ratios of 1 to 100 and upper keeping the conditions of pulverización, that is to say pressesure, degree of pulverización, angle, etc. This achieves by means of the control PWM (Presses With Modulation), in which it varies the ratio opening-closing of the gun to high frequency. For example, to apply 25% of discharge activates the gun of form cíclica 10 mili second ON and 30 mili second OFF. In lines with variation of speed, or with frequent stops, avoids the excessive or insufficient application since the ratio of application of product keeps independent constant of the speed of advance. With this reduce the rejections and the excessive consumption of product. The team is formed by the rampa of pulverización, the picture of control and regulation AutoJet, a bomb of diafragma and an eyector for agitation of the antiadherente in the interior of the tank and avoid the sedimentación.
